England booked their place in the last eight by edging past Colombia in a penalty shootout on Tuesday to raise hopes of a first World Cup title since 1966.
Colombian keeper David Ospina saved Jordan Henderson's effort, but Jordan Pickford turned away Carlos Bacca's attempt after Manuel Uribe hit the bar.
The waist-coated Southgate, whose quiet confidence and tranquil air have set the tone for this side, nearly collapsed as his knees buckled the very moment Dier squeezed the ball past the touch of Ospina and into the corner of the net.
Thirty minutes of extra time failed to celebrate the sides, before the young England team exorcised the demons of shootouts past with a 4-3 spotkick win.
And, going by social media, everyone in England is convinced that IT is finally coming home.
"I'm just delighted that we got through and hopefully we can keep building and keep going on". "We had the belief and the resilience to get over the line".
It's no secret that some of the England players are fans of Fortnite.
¡Fue hermoso! Oribe Peralta dice adiós a la Selección Mexicana
El futbolista del América hizo oficial su retiro de la selección mexicana luego de que el Tri quedó eliminado del Mundial tras la derrota 2-0 ante Brasil .
"Tonight was a classic example".
"Southgate's policy towards penalty takers is that they must be fit and comfortable to strike", said Wallace.
"In life, we always have to believe in what is possible and not be hindered by history or the expectations". He deserves all the credit because he's the one who's helped me prepare for penalties.
"We're a really close group".
They will now face Victor Lindelof's Sweden in Samara on Saturday afternoon for a place in the semi-final against either Russian Federation or Croatia.
"He's done well in Germany, but the top four in England are very good sides".
"We managed to break the mould", another said.
"We had an order", said the England manager, who joked the dressing room was like a "scene from M*A*S*H*".